CVE-2020-4161Network attack vector

Authenticated server crash via mishandled commands

Published Feb 19, 2020 · Updated Sep 16, 2024

Denial of service in IBM Db2 for Linux, UNIX, and Windows 11.5 allows remote authenticated users to crash the server with certain commands. IBM has not disclosed the affected command handler or commands; it states that incorrect handling terminates the Db2 server abnormally. Valid Db2 credentials and network access are required, and the documented consequence is service interruption without data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in IBM Db2 for Linux, UNIX, and Windows 11.5 allows remote authenticated users to crash the server with certain commands. IBM has not disclosed the affected command handler or commands; it states that incorrect handling terminates the Db2 server abnormally. Valid Db2 credentials and network access are required, and the documented consequence is service interruption without data disclosure or modification.

The record

CVE
CVE-2020-4161
Published
Feb 19, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Db2 for Linux, UNIX, and Windows
Classifications
T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Db2 for Linux, UNIX, and Windowsversion=11.5

Published CVSS scores

5.7IBMCVSS:3.0/A:H/PR:L/AC:L/C:N/UI:N/S:U/AV:N/I:N/RL:O/RC:C/E:U
6.5IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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